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John Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · New-Haven-County, Connecticut
Our Model Tree links this John Brennan across the 1920, 1930 and 1940 US Censuses in New-Haven-County, Connecticut (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 3-person household.
Age 48
b. ~1892
Male
Head
Born: Connecticut
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Haven-County, Connecticut |
| Surname | Brennan |
| Given Name | John D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Connecticut |
| 1935 Residence (City) | West Haven |
| 1935 Residence (County) | New Haven |
| Additional Details | |
| Occupation | Policeman |
| Industry | City |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2050 |
| Highest Grade | H 8 |
| 1935 Residence | Same Place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Policeman |
| Township / Ward | West Haven |
| Est. Birth Year | ~1892 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Brennan | Head | — | 48 | ~1892 |
| John Brennan | Son | — | 15 | ~1925 |
| May Brennan | Spouse | — | 41 | ~1899 |
Census Appearances
1920
New Haven, …
Other, age 23
New Haven, Connecticut · implied b. ~1897 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | John B. |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Connecticut |
| Mother's Birthplace | Connecticut |
| Occupation | Chemist |
| Industry | Gun Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1930
New Haven, …
Head, age 38
New Haven, Connecticut · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Connecticut |
| Age at First Marriage | 30 |
| Father's Birthplace | Connecticut |
| Mother's Birthplace | Connecticut |
| Occupation | Patrolman |
| Industry | Police |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4800 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
New-Haven-County, Connecticut
Head, age 48
New-Haven-County, Connecticut · implied b. ~1892 — 3 household members
| Surname | Brennan |
| Given Name | John D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Connecticut |
| 1935 Residence (City) | West Haven |
| 1935 Residence (County) | New Haven |
| Occupation | Policeman |
| Industry | City |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2050 |
| Highest Grade | H 8 |
| 1935 Residence | Same Place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links John Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Brennan
Head · 1940 · age 48 · b. ~1892 · Connecticut
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — New-Haven-County, Connecticut
Open full size
1940 US Federal Census — New-Haven-County, Connecticut
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00522-01019)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ethel Hamilton | 37 | wife | — | Connecticut |
| 2 | Jean Hamilton | 12 | daughter | — | Connecticut |
| 3 | Darwin Jr Hamilton | 10 | son | — | Connecticut |
| 4 | Barbara Hamilton | 8 | daughter | — | Connecticut |
| 5 | Myrtle Bergman | 69 | mother | — | New Hampshire |
| 6 | John D Brennan THIS PERSON | 48 | Head | Policeman | Connecticut |
| 7 | May Brennan | 41 | wife | — | Connecticut |
| 8 | John Brennan | 15 | son | — | Connecticut |
| 9 | Domenick Cenotti | 35 | Head | Auto Mechanic | Italy |
| 10 | Josephine Cenotti | 27 | wife | — | Connecticut |
| 11 | Angelo Cenotti | 9 | son | — | Connecticut |
| 12 | Peter Cenotti | 7 | son | — | Connecticut |
| 13 | Domenick Cenotti | 5 | son | — | Connecticut |
| 14 | Joseph Cenotti | 3 | son | — | Connecticut |
| 15 | Myra Cenotti | 2 | daughter | — | Connecticut |
| 16 | Anthony Cenotti | 0 | son | — | Connecticut |
| 17 | Carl H Olson | 42 | Head | Armand Rifle Adjuster | Connecticut |
| 18 | Alice M Olson | 38 | Wife | — | Connecticut |
| 19 | Jane Tyther | 72 | Mother-in-law | — | Scotland |
| 20 | Henry Endriss | 29 | Head | Receiving Clerk | Connecticut |
| 21 | Mary Endriss | 27 | wife | — | Connecticut |
| 22 | Patricia Endriss | 3 | daughter | — | Connecticut |
| 23 | Mary Endriss | 2 | daughter | — | Connecticut |
| 24 | James L Beaton | 54 | Head | — | Canada English |
| 25 | Anna M Beaton | 60 | wife | — | Rhode Island |
| 26 | Anna Sullivan | 29 | daughter | Floor Lady | Rhode Island |
| 27 | Claire Beaton | 24 | daughter | Box Catcher | New York |
| 28 | Vincent Beaton | 19 | son | Shipping Clerk | Rhode Island |
| 29 | Paul Sullivan | 7 | Grandson | — | Rhode Island |
| 30 | Albert R Menge | 25 | Head | Truck Loader | Massachusetts |
| 31 | Cecelia G Menge | 22 | wife | — | Rhode Island |
| 32 | Menge | 1 | daughter | — | Connecticut |
| 33 | James Hart | 55 | Head | Chauffeur | Connecticut |
| 34 | May Hart | 40 | Wife | — | New York |
| 35 | Sylvester E Nichols | 42 | Head | Auto Body Repairer | New York |
| 36 | Edna A Nichols | 40 | wife | — | Connecticut |
| 37 | Eunice Nichols | 12 | daughter | — | Connecticut |
| 38 | Jeanette Nichols | 8 | daughter | — | Connecticut |
| 39 | Charles Colligan | 62 | Head | Watchman | Connecticut |
| 40 | Susan Colligan | 65 | sister | — | Connecticut |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)